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Diffstat (limited to 'sysdeps/x86_64/dl-machine.h')
-rw-r--r--sysdeps/x86_64/dl-machine.h114
1 files changed, 57 insertions, 57 deletions
diff --git a/sysdeps/x86_64/dl-machine.h b/sysdeps/x86_64/dl-machine.h
index 959b1328d7..8c67b5b5f9 100644
--- a/sysdeps/x86_64/dl-machine.h
+++ b/sysdeps/x86_64/dl-machine.h
@@ -1,5 +1,5 @@
/* Machine-dependent ELF dynamic relocation inline functions. x86-64 version.
- Copyright (C) 2001-2005, 2006 Free Software Foundation, Inc.
+ Copyright (C) 2001-2005, 2006, 2008, 2009 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Andreas Jaeger <aj@suse.de>.
@@ -266,40 +266,45 @@ elf_machine_rela (struct link_map *map, const Elf64_Rela *reloc,
Elf64_Addr *const reloc_addr = reloc_addr_arg;
const unsigned long int r_type = ELF64_R_TYPE (reloc->r_info);
-#if !defined RTLD_BOOTSTRAP || !defined HAVE_Z_COMBRELOC
+# if !defined RTLD_BOOTSTRAP || !defined HAVE_Z_COMBRELOC
if (__builtin_expect (r_type == R_X86_64_RELATIVE, 0))
{
-# if !defined RTLD_BOOTSTRAP && !defined HAVE_Z_COMBRELOC
+# if !defined RTLD_BOOTSTRAP && !defined HAVE_Z_COMBRELOC
/* This is defined in rtld.c, but nowhere in the static libc.a;
make the reference weak so static programs can still link.
This declaration cannot be done when compiling rtld.c
(i.e. #ifdef RTLD_BOOTSTRAP) because rtld.c contains the
common defn for _dl_rtld_map, which is incompatible with a
weak decl in the same file. */
-# ifndef SHARED
+# ifndef SHARED
weak_extern (GL(dl_rtld_map));
-# endif
+# endif
if (map != &GL(dl_rtld_map)) /* Already done in rtld itself. */
-# endif
+# endif
*reloc_addr = map->l_addr + reloc->r_addend;
}
else
-#endif
+# endif
if (__builtin_expect (r_type == R_X86_64_NONE, 0))
return;
else
{
-#ifndef RTLD_BOOTSTRAP
+# ifndef RTLD_BOOTSTRAP
const Elf64_Sym *const refsym = sym;
-#endif
+# endif
struct link_map *sym_map = RESOLVE_MAP (&sym, version, r_type);
Elf64_Addr value = (sym == NULL ? 0
: (Elf64_Addr) sym_map->l_addr + sym->st_value);
-#if defined RTLD_BOOTSTRAP && !USE___THREAD
+ if (sym != NULL
+ && __builtin_expect (ELFW(ST_TYPE) (sym->st_info) == STT_GNU_IFUNC,
+ 0))
+ value = ((Elf64_Addr (*) (void)) value) ();
+
+# if defined RTLD_BOOTSTRAP && !USE___THREAD
assert (r_type == R_X86_64_GLOB_DAT || r_type == R_X86_64_JUMP_SLOT);
*reloc_addr = value + reloc->r_addend;
-#else
+# else
switch (r_type)
{
case R_X86_64_GLOB_DAT:
@@ -307,47 +312,47 @@ elf_machine_rela (struct link_map *map, const Elf64_Rela *reloc,
*reloc_addr = value + reloc->r_addend;
break;
-#ifndef RESOLVE_CONFLICT_FIND_MAP
+# ifndef RESOLVE_CONFLICT_FIND_MAP
case R_X86_64_DTPMOD64:
-# ifdef RTLD_BOOTSTRAP
+# ifdef RTLD_BOOTSTRAP
/* During startup the dynamic linker is always the module
with index 1.
XXX If this relocation is necessary move before RESOLVE
call. */
*reloc_addr = 1;
-# else
+# else
/* Get the information from the link map returned by the
resolve function. */
if (sym_map != NULL)
*reloc_addr = sym_map->l_tls_modid;
-# endif
+# endif
break;
case R_X86_64_DTPOFF64:
-# ifndef RTLD_BOOTSTRAP
+# ifndef RTLD_BOOTSTRAP
/* During relocation all TLS symbols are defined and used.
Therefore the offset is already correct. */
if (sym != NULL)
*reloc_addr = sym->st_value + reloc->r_addend;
-# endif
+# endif
break;
case R_X86_64_TLSDESC:
{
struct tlsdesc volatile *td =
(struct tlsdesc volatile *)reloc_addr;
-# ifndef RTLD_BOOTSTRAP
+# ifndef RTLD_BOOTSTRAP
if (! sym)
{
td->arg = (void*)reloc->r_addend;
td->entry = _dl_tlsdesc_undefweak;
}
else
-# endif
+# endif
{
-# ifndef RTLD_BOOTSTRAP
-# ifndef SHARED
+# ifndef RTLD_BOOTSTRAP
+# ifndef SHARED
CHECK_STATIC_TLS (map, sym_map);
-# else
+# else
if (!TRY_STATIC_TLS (map, sym_map))
{
td->arg = _dl_make_tlsdesc_dynamic
@@ -355,8 +360,8 @@ elf_machine_rela (struct link_map *map, const Elf64_Rela *reloc,
td->entry = _dl_tlsdesc_dynamic;
}
else
+# endif
# endif
-# endif
{
td->arg = (void*)(sym->st_value - sym_map->l_tls_offset
+ reloc->r_addend);
@@ -367,13 +372,13 @@ elf_machine_rela (struct link_map *map, const Elf64_Rela *reloc,
}
case R_X86_64_TPOFF64:
/* The offset is negative, forward from the thread pointer. */
-# ifndef RTLD_BOOTSTRAP
+# ifndef RTLD_BOOTSTRAP
if (sym != NULL)
-# endif
+# endif
{
-# ifndef RTLD_BOOTSTRAP
+# ifndef RTLD_BOOTSTRAP
CHECK_STATIC_TLS (map, sym_map);
-# endif
+# endif
/* We know the offset of the object the symbol is contained in.
It is a negative value which will be added to the
thread pointer. */
@@ -381,42 +386,41 @@ elf_machine_rela (struct link_map *map, const Elf64_Rela *reloc,
- sym_map->l_tls_offset);
}
break;
-#endif
+# endif
-#ifndef RTLD_BOOTSTRAP
+# ifndef RTLD_BOOTSTRAP
case R_X86_64_64:
*reloc_addr = value + reloc->r_addend;
break;
case R_X86_64_32:
- *(unsigned int *) reloc_addr = value + reloc->r_addend;
- if (value + reloc->r_addend > UINT_MAX)
+ value += reloc->r_addend;
+ *(unsigned int *) reloc_addr = value;
+
+ const char *fmt;
+ if (__builtin_expect (value > UINT_MAX, 0))
{
const char *strtab;
+ fmt = "\
+%s: Symbol `%s' causes overflow in R_X86_64_32 relocation\n";
+ print_err:
strtab = (const char *) D_PTR (map, l_info[DT_STRTAB]);
- _dl_error_printf ("\
-%s: Symbol `%s' causes overflow in R_X86_64_32 relocation\n",
+ _dl_error_printf (fmt,
rtld_progname ?: "<program name unknown>",
strtab + refsym->st_name);
}
break;
-# ifndef RESOLVE_CONFLICT_FIND_MAP
+# ifndef RESOLVE_CONFLICT_FIND_MAP
/* Not needed for dl-conflict.c. */
case R_X86_64_PC32:
- *(unsigned int *) reloc_addr = value + reloc->r_addend
- - (Elf64_Addr) reloc_addr;
- if (value + reloc->r_addend - (Elf64_Addr) reloc_addr
- != (int)(value + reloc->r_addend - (Elf64_Addr) reloc_addr))
+ value += reloc->r_addend - (Elf64_Addr) reloc_addr;
+ *(unsigned int *) reloc_addr = value;
+ if (__builtin_expect (value != (unsigned int) value, 0))
{
- const char *strtab;
-
- strtab = (const char *) D_PTR (map, l_info[DT_STRTAB]);
-
- _dl_error_printf ("\
-%s: Symbol `%s' causes overflow in R_X86_64_PC32 relocation\n",
- rtld_progname ?: "<program name unknown>",
- strtab + refsym->st_name);
+ fmt = "\
+%s: Symbol `%s' causes overflow in R_X86_64_PC32 relocation\n";
+ goto print_err;
}
break;
case R_X86_64_COPY:
@@ -424,26 +428,22 @@ elf_machine_rela (struct link_map *map, const Elf64_Rela *reloc,
/* This can happen in trace mode if an object could not be
found. */
break;
+ memcpy (reloc_addr_arg, (void *) value,
+ MIN (sym->st_size, refsym->st_size));
if (__builtin_expect (sym->st_size > refsym->st_size, 0)
|| (__builtin_expect (sym->st_size < refsym->st_size, 0)
&& GLRO(dl_verbose)))
{
- const char *strtab;
-
- strtab = (const char *) D_PTR (map, l_info[DT_STRTAB]);
- _dl_error_printf ("\
-%s: Symbol `%s' has different size in shared object, consider re-linking\n",
- rtld_progname ?: "<program name unknown>",
- strtab + refsym->st_name);
+ fmt = "\
+%s: Symbol `%s' has different size in shared object, consider re-linking\n";
+ goto print_err;
}
- memcpy (reloc_addr_arg, (void *) value,
- MIN (sym->st_size, refsym->st_size));
break;
-# endif
+# endif
default:
_dl_reloc_bad_type (map, r_type, 0);
break;
-#endif
+# endif
}
#endif
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-07 17:48:57 +0000